These are introduced around the same time and look very similar to me. I have mistaken them for each other.
Can they be added to the similar kanji sections for each other?
Yeah, I mix them up in the review as well ^^. +1 from me.
Since 潰 is a relatively new addition I think they simply forgot.
Not to mention that 貴 and 責 are already listed as similar.
Just added, thanks!